255553431 has 16 divisors (see below), whose sum is σ = 394109184. Its totient is φ = 144270144.

The previous prime is 255553427. The next prime is 255553433. The reversal of 255553431 is 134355552.

It is a happy number.

It is not a de Polignac number, because 255553431 - 2² = 255553427 is a prime.

It is a super-2 number, since 2×255553431² = 130615112191743522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 255553392 and 255553401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255553433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71566 + ... + 75051.

It is an arithmetic number, because the mean of its divisors is an integer number (24631824).

Almost surely, 2^255553431 is an apocalyptic number.

255553431 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

255553431 is a deficient number, since it is larger than the sum of its proper divisors (138555753).

255553431 is a wasteful number, since it uses less digits than its factorization.

255553431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146710.

The product of its digits is 45000, while the sum is 33.

The square root of 255553431 is about 15986.0386275024. The cubic root of 255553431 is about 634.5909954252.

The spelling of 255553431 in words is "two hundred fifty-five million, five hundred fifty-three thousand, four hundred thirty-one".